1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/resource.h> 42 #include <sys/sx.h> 43 #include <sys/vmmeter.h> 44 #include <sys/smp.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_page.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_param.h> 50 #include <vm/pmap.h> 51 #include <vm/vm_map.h> 52 #include <vm/vm_object.h> 53 #include <sys/sysctl.h> 54 55 /* 56 * Virtual memory MPSAFE temporary workarounds. 57 */ 58 int debug_mpsafevm; 59 TUNABLE_INT("debug.mpsafevm", &debug_mpsafevm); 60 SYSCTL_INT(_debug, OID_AUTO, mpsafevm, CTLFLAG_RD, &debug_mpsafevm, 0, 61 "Enable/disable MPSAFE virtual memory support"); 62 63 struct vmmeter cnt; 64 65 int maxslp = MAXSLP; 66 67 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 68 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 69 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 70 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 71 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 72 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 73 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 74 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 75 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 76 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 77 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 78 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 79 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 80 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 81 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 82 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 83 84 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 85 &averunnable, loadavg, "Machine loadaverage history"); 86 87 static int 88 vmtotal(SYSCTL_HANDLER_ARGS) 89 { 90 /* XXXKSE almost completely broken */ 91 struct proc *p; 92 struct vmtotal total, *totalp; 93 vm_map_entry_t entry; 94 vm_object_t object; 95 vm_map_t map; 96 int paging; 97 struct thread *td; 98 99 totalp = &total; 100 bzero(totalp, sizeof *totalp); 101 /* 102 * Mark all objects as inactive. 103 */ 104 GIANT_REQUIRED; 105 mtx_lock(&vm_object_list_mtx); 106 TAILQ_FOREACH(object, &vm_object_list, object_list) { 107 if (!VM_OBJECT_TRYLOCK(object)) { 108 /* 109 * Avoid a lock-order reversal. Consequently, 110 * the reported number of active pages may be 111 * greater than the actual number. 112 */ 113 continue; 114 } 115 vm_object_clear_flag(object, OBJ_ACTIVE); 116 VM_OBJECT_UNLOCK(object); 117 } 118 mtx_unlock(&vm_object_list_mtx); 119 /* 120 * Calculate process statistics. 121 */ 122 sx_slock(&allproc_lock); 123 FOREACH_PROC_IN_SYSTEM(p) { 124 if (p->p_flag & P_SYSTEM) 125 continue; 126 mtx_lock_spin(&sched_lock); 127 switch (p->p_state) { 128 case PRS_NEW: 129 mtx_unlock_spin(&sched_lock); 130 continue; 131 break; 132 default: 133 FOREACH_THREAD_IN_PROC(p, td) { 134 /* Need new statistics XXX */ 135 switch (td->td_state) { 136 case TDS_INHIBITED: 137 if (TD_ON_LOCK(td) || 138 (td->td_inhibitors == 139 TDI_SWAPPED)) { 140 totalp->t_sw++; 141 } else if (TD_IS_SLEEPING(td) || 142 TD_AWAITING_INTR(td) || 143 TD_IS_SUSPENDED(td)) { 144 if (td->td_priority <= PZERO) 145 totalp->t_dw++; 146 else 147 totalp->t_sl++; 148 } 149 break; 150 151 case TDS_CAN_RUN: 152 totalp->t_sw++; 153 break; 154 case TDS_RUNQ: 155 case TDS_RUNNING: 156 totalp->t_rq++; 157 continue; 158 default: 159 break; 160 } 161 } 162 } 163 mtx_unlock_spin(&sched_lock); 164 /* 165 * Note active objects. 166 */ 167 paging = 0; 168 map = &p->p_vmspace->vm_map; 169 vm_map_lock_read(map); 170 for (entry = map->header.next; 171 entry != &map->header; entry = entry->next) { 172 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 173 (object = entry->object.vm_object) == NULL) 174 continue; 175 VM_OBJECT_LOCK(object); 176 vm_object_set_flag(object, OBJ_ACTIVE); 177 paging |= object->paging_in_progress; 178 VM_OBJECT_UNLOCK(object); 179 } 180 vm_map_unlock_read(map); 181 if (paging) 182 totalp->t_pw++; 183 } 184 sx_sunlock(&allproc_lock); 185 /* 186 * Calculate object memory usage statistics. 187 */ 188 mtx_lock(&vm_object_list_mtx); 189 TAILQ_FOREACH(object, &vm_object_list, object_list) { 190 /* 191 * Perform unsynchronized reads on the object to avoid 192 * a lock-order reversal. In this case, the lack of 193 * synchronization should not impair the accuracy of 194 * the reported statistics. 195 */ 196 if (object->type == OBJT_DEVICE) { 197 /* 198 * Devices, like /dev/mem, will badly skew our totals. 199 */ 200 continue; 201 } 202 totalp->t_vm += object->size; 203 totalp->t_rm += object->resident_page_count; 204 if (object->flags & OBJ_ACTIVE) { 205 totalp->t_avm += object->size; 206 totalp->t_arm += object->resident_page_count; 207 } 208 if (object->shadow_count > 1) { 209 /* shared object */ 210 totalp->t_vmshr += object->size; 211 totalp->t_rmshr += object->resident_page_count; 212 if (object->flags & OBJ_ACTIVE) { 213 totalp->t_avmshr += object->size; 214 totalp->t_armshr += object->resident_page_count; 215 } 216 } 217 } 218 mtx_unlock(&vm_object_list_mtx); 219 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 220 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 221 } 222 223 /* 224 * vcnt() - accumulate statistics from all cpus and the global cnt 225 * structure. 226 * 227 * The vmmeter structure is now per-cpu as well as global. Those 228 * statistics which can be kept on a per-cpu basis (to avoid cache 229 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 230 * statistics, such as v_free_reserved, are left in the global 231 * structure. 232 * 233 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 234 */ 235 static int 236 vcnt(SYSCTL_HANDLER_ARGS) 237 { 238 int error = 0; 239 int count = *(int *)arg1; 240 #ifdef SMP 241 int i; 242 int offset = (char *)arg1 - (char *)&cnt; 243 244 for (i = 0; i < mp_ncpus; ++i) { 245 struct pcpu *pcpu = pcpu_find(i); 246 count += *(int *)((char *)&pcpu->pc_cnt + offset); 247 } 248 #else 249 int offset = (char *)arg1 - (char *)&cnt; 250 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 251 #endif 252 error = SYSCTL_OUT(req, &count, sizeof(int)); 253 return(error); 254 } 255 256 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 257 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 258 "System virtual memory statistics"); 259 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 260 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 261 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 262 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 263 264 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 265 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 266 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 267 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 268 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 270 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 272 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 274 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 276 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 278 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 280 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 282 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_dfree, 0, vcnt, "IU", ""); 310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_pfree, 0, vcnt, "IU", ""); 312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_tfree, 0, vcnt, "IU", ""); 314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_page_size, 0, vcnt, "IU", ""); 316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_page_count, 0, vcnt, "IU", ""); 318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_free_target, 0, vcnt, "IU", ""); 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_free_min, 0, vcnt, "IU", ""); 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_free_count, 0, vcnt, "IU", ""); 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_wire_count, 0, vcnt, "IU", ""); 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_active_count, 0, vcnt, "IU", ""); 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_cache_count, 0, vcnt, "IU", ""); 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_cache_min, 0, vcnt, "IU", ""); 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_cache_max, 0, vcnt, "IU", ""); 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 345 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 347 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 349 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 351 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 353 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 355 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 357 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 359 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 360 361 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 362 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 363 #if 0 364 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 365 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 366 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 367 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 368 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 369 first_page, CTLFLAG_RD, &first_page, 0, ""); 370 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 371 last_page, CTLFLAG_RD, &last_page, 0, ""); 372 #endif 373